I don't know what you tried, but there is no limit specified for the max
attribute it can be any floating-point number
**Floating-point Number**
A floating-point number consists of the following parts, in exactly the following order:
Optionally, the first character may be a "-" character.
One or more characters in the range "0—9".
Optionally, the following parts, in exactly the following order:
a "." character
one or more characters in the range "0—9"
Optionally, the following parts, in exactly the following order:
a "e" character or "E" character
optionally, a "-" character or "+" character
One or more characters in the range "0—9".
For more info. http://www.w3.org/TR/html-markup/input.number.html
You can find your answer from How can I limit possible inputs in a HTML5 "number" element?
For online test use this site http://www.w3schools.com/html/html5_form_input_types.asp
And for datetime
you can refer http://tjvantoll.com/2012/06/30/creating-a-native-html5-datepicker-with-a-fallback-to-jquery-ui/